In the last days of the imaginary dynasty when rituals and music have collapsed, "Cihang Jingtang" looks like charity, but in fact it is a devil's cave harboring filth and evil; "Qiwu Villa" is gorgeous in appearance, but it is a prison that imprisons the soul. The killer Jiang Wan, who was raised by Master Jingchen, is like a poison-quenched sharp knife, crazy and paranoid, and extremely possessive. The remnants of the imprisoned former dynasty are burning with karma, dark and gloomy, and full of control. When the poisonous flowers enter the cage and the sick bones begin to bite, they test, use, and plot each other, and are attracted to each other unknowingly. A story of extreme revenge and morbid bond slowly opens in conspiracy and darkness. Are they each other's poison or the only antidote?